Fee Income from Contracts with Customers - Narrative (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Disaggregation of Revenue [Line Items]
Deferred fee income	$ 3		$ 3
Credit card fees, net
Disaggregation of Revenue [Line Items]
Interchange fees	27	$ 26
Rewards program costs	$ 15	$ 16